Invention Grant
- Patent Title: Digital rights management (DRM) encryption and data-protection for content on device without interactive authentication
- Patent Title (中): 数字版权管理（DRM）加密和数据保护功能，无需交互式认证
-
Application No.: US11400427Application Date: 2006-04-06
-
Publication No.: US07730329B2Publication Date: 2010-06-01
- Inventor: Clifford P. Strom , Krishnamurthy Ganesan , Jonas Fredrik Helin
- Applicant: Clifford P. Strom , Krishnamurthy Ganesan , Jonas Fredrik Helin
- Applicant Address: US WA Redmond
- Assignee: Microsoft Corporation
- Current Assignee: Microsoft Corporation
- Current Assignee Address: US WA Redmond
- Agency: Woodcock Washburn LLP
- Main IPC: G06F11/30
- IPC: G06F11/30
Abstract:
To render content on a medium, a device obtains a table from the medium, obtains a private key of the device (PR-PD), indexes into an entry of the table based thereon, obtains (PU-PD(RND)) from the indexed-into entry of the table, and applies (PR-PD) to (PU-PD(RND)) to expose a random key (RND). Then, the device obtains (RND(PR-PM)) from the table, applies (RND) to (RND(PR-PM)) to expose a private key of the medium (PR-PM), obtains (PU-PM(KD)) from the license, applies (PR-PM) to (PU-PM(KD)) to expose a content key (KD), obtains (KD(content)) from the storage medium, applies (KD) to (KD(content)) to expose the content.
Public/Granted literature
Information query
